CVE-2026-84533 in iOS
Summary
by MITRE • 09/15/2026
A cryptographic issue was addressed with improved integrity checks. This issue is fixed in iOS 27 and iPadOS 27, macOS Golden Gate 27, tvOS 27, watchOS 27. An attacker in a privileged network position may be able to modify network traffic.
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Analysis
by VulDB Data Team • 09/15/2026
The vulnerability described involves a cryptographic integrity failure within the operating systems of Apple devices, specifically affecting iOS 27, iPadOS 27, macOS Golden Gate 27, tvOS 27, and watchOS 27. The core technical flaw lies in insufficient validation mechanisms for data received over network connections. While these platforms employ robust cryptographic protocols to secure communications, the specific implementation contained a weakness that allowed an attacker positioned within the same privileged network segment to intercept and alter transmitted packets without detection. This indicates a lapse in the application of integrity checks, such as Message Authentication Codes or digital signatures, which are essential for ensuring that data has not been tampered with during transit. The absence of rigorous verification allows malicious actors to inject false information or modify existing commands, undermining the trustworthiness of the communication channel.
From a technical perspective, this issue aligns closely with CWE-354, Improper Validation of Integrity Check Value, and potentially CWE-295, Improper Certificate Validation if certificate handling was involved in the flawed process. The vulnerability exploits the assumption that network traffic is inherently secure within trusted or privileged segments, a common misconception known as the security boundary fallacy. By bypassing integrity checks, an attacker can perform man-in-the-middle attacks with greater efficacy than standard interception techniques allow. This capability enables the modification of sensitive data streams, configuration updates, or authentication tokens before they reach their intended destination on the device. The impact is severe because it compromises both confidentiality and integrity, allowing for potential remote code execution if the modified traffic triggers specific vulnerabilities in higher-level applications that process this unverified input.
The operational impact of this vulnerability extends beyond simple data eavesdropping. An attacker with a privileged network position can manipulate system updates, inject malicious payloads into software distribution channels, or alter authentication processes to gain unauthorized access to user accounts and device resources. This could lead to full compromise of the affected Apple devices within the targeted network environment. For enterprise environments relying on these operating systems for critical infrastructure management, such as mobile device management solutions or secure communication platforms, this flaw represents a significant risk vector that could be exploited to disrupt operations or steal proprietary information. The lack of integrity verification means that even encrypted traffic might appear valid while containing altered content, making detection by standard intrusion prevention systems difficult without deep packet inspection capabilities specifically tuned for cryptographic anomalies.
Mitigation strategies primarily involve applying the software updates provided in iOS 27, iPadOS 27, macOS Golden Gate 27, tvOS 27, and watchOS 27, which address these integrity check deficiencies by implementing stronger validation routines. Organizations should ensure that all devices are patched to the latest available version to close this specific cryptographic gap. Additionally, network administrators should enforce strict segmentation policies to limit access to privileged networks where such attacks could be launched from within. Implementing mutual authentication protocols and ensuring that all communications rely on verified certificate chains can further reduce the risk of successful exploitation. Security teams should also monitor for unusual patterns in network traffic that might indicate active attempts to exploit this integrity weakness, although reliance solely on detection is insufficient given the stealthy nature of cryptographic bypasses. Continuous monitoring and adherence to industry standards like NIST SP 800-52 regarding TLS implementation guidelines will help maintain robust security postures against such sophisticated threats.